Question

this feature is formed when two tectonic plates collide and one plate sinks below another. this feature is a crack in earths crust, usually formed when pieces of crust move past each other. this feature is a crack in earths crust formed as pieces of the crust separate.

Explanation:

The first description refers to subduction which forms trenches. The second is a fault from lateral - movement of crustal pieces. The third is a rift formed by crust separation.

Answer:

1. Trench
2. Fault
3. Rift